calculations

easy

100

2+2

4

200

10+5

15

300

5-5

0

400

100-40

60

500

65+65

130

medium

100

5*5

25

200

4/2

2

300

5*10

50

400

5/10

2

500

40/40

1

difficult

100

5*5-5

20

200

10 - (4/2)

8

300

40*2+2-1

9

400

4*2-4+ 12 - 4

12

500

200+50-41

209